Re: [PATCH regression] net: phy: fix initialization (config_init) for Marvel 88E1116R PHYs

From: Alexander Holler
Date: Thu Apr 03 2014 - 11:46:02 EST


Am 03.04.2014 17:14, schrieb David Miller:
From: Alexander Holler <holler@xxxxxxxxxxxxx>
Date: Thu, 03 Apr 2014 17:06:52 +0200

But don't suggest me (or insist on) a time consuming

Bisects are not time consuming, and help developers analyze your
issue tremendously.

Hmm, compiling and booting several dozen kernels isn't time consuming? Then I must have done something wrong in the past.

And I wonder why I've writen descriptions at all, if nobody wants to understand that I already know the patch which leads to a broken network on that system.

If the patch is really the reason for the problem, is something totally different, but bisecting won't help here. Besides that I know since 4 years that netconsole is broken on that box, it just never broke the network or anything else. And so I ignored it, foreseeing the necessary time to debug and especially describe and discuss the problem.

You see, I'm already feeling like just talking with myself. But just in case: After reverting patch 7cd1463, there exist a online-change to turn on/off the problem:

------
diff --git a/drivers/net/ethernet/marvell/mv643xx_eth.c b/drivers/net/ethernet/marvell/mv643xx_eth.c
index e891b48..246f065 100644
--- a/drivers/net/ethernet/marvell/mv643xx_eth.c
+++ b/drivers/net/ethernet/marvell/mv643xx_eth.c
@@ -2095,7 +2095,8 @@ static void port_start(struct mv643xx_eth_private *mp)
struct ethtool_cmd cmd;

mv643xx_eth_get_settings(mp->dev, &cmd);
- phy_reset(mp);
+ //phy_reset(mp);
+ phy_init_hw(mp->phy);
mv643xx_eth_set_settings(mp->dev, &cmd);
phy_start(mp->phy);
}
------

Thats basically just what the reverted patch does. Now, why should I still bisect?

Of course, my first assumption that the changed reset is the bug is wrong, it just makes the problem to appear. But that wrong assumption still doesn't make a bisect necessary. And it's discouraging if people still insist on that.

I will see if I spend the time to write down a more detailed description about what happens here.

Regards,

Alexander Holler
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